orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge.
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When and where do orographic occur?
Orographic Lifting
Same as Upslope Flow; occurs when air is forced to rise and cool due to terrain features such as hills or mountains. If the cooling is sufficient, water vapor condenses into clouds.
Why does orographic rainfall occur in most of the world?
Answer 3: Orographic rainfall occurs in most of the world: Orographic rainfall occurs because of the obstruction of moisture laden clouds by the mountains and areas of high altitudes. These clouds are generally blown by the winds.
Where does relief or orographic rainfall occur?
mountains
Relief or orographic rain is formed when air is forced to cool when it rises over relief features in the landscape such as hills or mountains. As it rises it cools, condenses and forms rain. The highest rainfall totals of over 1,600 mm per year occur in the mountain areas along the west coast.
How does orographic rainfall occur Class 7?
Orographic rainfall occurs when a mass of air is pushed up because of a structure with very high elevation, such as a mountain. The lifted air cools down and precipitation occurs. Rain shadow area is formed on the other side of the elevation.
What is the other name of orographic rainfall?
Relief precipitation is another name for orographic precipitation. As the air rises and cools, orographic clouds develop and serve as a source of precipitation, with the majority falling upwind of the mountain crest. Spillover refers to falls that occur a short distance downwind of the crest.
Where is rainfall most common?
Cherrapunji, situated on the southern slopes of the Eastern Himalaya in Shillong, India is one of the wettest places on Earth, with an average annual rainfall of 11,430 mm (450 in). The highest recorded rainfall in a single year was 22,987 mm (904.9 in) in 1861.
Is Monsoon orographic rainfall?
Rainfall in India through Southwest monsoon and northeast monsoon is orographic.
Why is orographic rainfall also called relief rainfall?
When the saturated air his obstructed by land form barrier such as mountains, it is forced to ascend and as it rises, it expands and temperature falls. As a result, condensation takes place and rainfall occurs. This type of rainfall is called as relief rain or orographic rainfall.
What is orographic rainfall in geography?
Orographic rainfall also called orographic precipitation or snow. Orographic rainfall is precipitation produced when the mountains of uplands act as barriers to airflow, forcing the air to rise and the moist air moving upslope coo down by producing clouds and precipitation.
Which type of rainfall is received in mountainous areas?
orographic rainfall
The type of precipitation in mountainous areas is called a relief rainfall or orographic rainfall.
What is an example of orographic precipitation?
Precipitation caused or enhanced by one of the mechanisms of orographic lifting of moist air. Examples of precipitation caused by mountains include rainfall from orographic stratus produced by forced lifting and precipitation from orographic cumuli caused by daytime heating of mountain slopes.
Where is orographic rainfall in India?
The Western Ghats
Complete answer:
The Western Ghats in India provide favorable conditions for orographic rainfall. The warm and moist air from the Arabian sea is blocked by the Western Ghats and gets lifted over mountain ranges.
How are the 3 types of rainfall formed?
The causes of relief rainfall, frontal rainfall and conventional rainfall are examined. Relief rainfall occurs when air has been blown over the sea and is then forced up over an area of high land.
What type of rainfall occurs in India?
- The most common type of rainfall in India is relief rainfall.
- It is formed when air is raised over hills and mountains. As it rises the air gets cooled and condensed to form rain. It usually occurs in coastal areas.
Where does the orographic effect occur?
The orographic effect occurs when air masses are forced to flow over high topography. As air rises over mountains, it cools and water vapor condenses. As a result, it is common for rain to be concentrated on the windward side of mountains, and for rainfall to increase with elevation in the direction of storm tracks.
What type of clouds are orographic?
The most common orographic clouds belong to the genera Altocumulus, Stratocumulus, and Cumulus. It is important to observe clouds in mountainous terrain because they may provide an indication of changes in the weather that could have implications on safety.
What are the main features of orographic rainfall?
Orographic Rainfall – Major Characteristics
When the saturated air mass comes across a mountain, it is forced to rise. The rising air expands, eventually, the temperature falls, and the moisture gets condensed. The principal characteristic of this type of rain is that the windward slopes get more rainfall.
Does London have snow?
The city can sometimes experience extremes. Snowfall is an infrequent occurrence in winter, falling on an average of 16 days per year, though infrequently heavy.
Where is the highest rainfall in the world?
Mawsynram
Mawsynram is a place that receives the highest average rainfall in the world. This place is located in Meghalaya.
What place has lowest rainfall?
Chile is the place in the world which is known for the least amount of rainfall. The lowest average rainfall in Chile is found in the city of Arica. Average rainfall of Arica is 0.03 inch per year. Atacama Desert surrounds the city of Arica.